Helve operated hammer



2 Sheets-Sheet w. A. ROCKENFIELD HELVE OPERATED mama Filed Feb. 27,

Q d W4 N O 2 m w l 5 //v/ /A////////////4 Jan. 5, 1932.

sn- WWO 3 1 Jan. 5, 1932. w. A. ROCKENFIELD 1,340,174

HELVE OPERATED HAMMER Filed Feb. 27, 1929 2 Sheet-Sheet 2 INVENTOR- fl-B K f ATTORNEY Patented Jan. 5, 1932 N D- STATES PATIENT oFFies WILLIAMA. nocxnnrrnnn, on nocnns rnn, new YORK, ne -sienna HIGH ssnnn HAMMERco. INC., on noonns'rnn, nnw vonma oonrona'rron on NEW some HELVEornaa'rnn Her/Hana Application filed February'2 7, "1929."Seria1 No.343,171.

The present invention relates tohelve operated hammers, and an objectthereof is to provide a novel means of connecting the helve to a. rotaryhammer so as to obtain a better bearing for the hammer. Another objectof theinv'ention is to provide a helve and hammer connection embodying astrap in which the ends of the strap are connected by a bearing member.the invention is to improve the "elastic connection between the helveand its operating pitman whereby the strength of such connectioniisincreased while the cost of manufacture is reduced. A further ob ect ofthe 7- invention is to provide an improved bearing on the support forthe hammer.

To these and other ends, theinvention consists of certain parts andcombinations of parts all of which will be hereinafter described: thenovel features being pointed out in the appended claims.

In the drawings:

Fig. 1 is a side view of the upper portion of a hammer embodying thepresent invention;

Fig. 2 is a vertical section through the hammer support; 7

Fig. 3 is an end view of the helve showing its connection with thehammer;

Fig. i is a section on the line 4%, Fig. 3;

Fig. 5 is an enlarged side view partially in section of the elasticconnection between the pitman and the helve; and

Fig. 6 is a fragmentary view of the helve pitman connection partially insection. I

- In the illustrated embodiment, 1 indicates the upper support, thelower anvilcarrying frame not being shown. This upper-support projectsforwardly and has at the outer forward end a vertical opening formed atits top with a pocket 2. In the vertical opening is a bearing sleeve 3.Turning in the bear:

ing sleeve is a sleeve 4 having a flange 5cat its upper end in thepocket 2. Beneath this flange 5 there is secured a worm gear 6 by 1 pins7, the gear lying in the pocket 2 and meshing with a worm 8 which isdriven by a belt 9 from the drive pulley 10. Above the gear 6 is awasher 11 and a cover 12 secured by screws 13 holds the sleeve 4 andgear 6 in the pocket. The hammer 14 extends Still'another object of 2through the sleeve '7. and is connected to said sleeve by a key 15onrthe inner face of the sleeve projecting into a'groove or way in thehammer, thus causing the hammer to turn Withthe sleeve 4 but permittingthe hammer toslide longitudinally in the sleeve, By this constructionthe hammer doesnot reciprocate and turn in its earings. It has a slidingmovement in the sleeve which acts as a bearing, thus increasing theuseful life of the bearing by'cutting down wear. Further, the

hammer has amore durable connection with hammerwith the sleeve and thesleeve con nects with the gear through a flange.

gether there is providedayfiexible strap formed of leather or othersuitable material and havingv its ends secured together by a hearing. Inthis instance, this bearing comprises two members or plates 21 and 22each having the hammer 14; passed therethrough beneath thefiange orshoulder 16, the two plates being; held together by bolts' 23 andholding between them the two opposite ends of the strap 20, the boltsalso passing through the straps. The plate 22 has its edges turnedupwardly on-opposite sides of the plate 21 so as to support the leatherstrap adjacent the bends. A, washer 24 is interposed between the flange16 and theupper plate 21.

This strap connection makes it possible for the userof the machine toreadily replace the strap when the latter becomes worn or broken.Thehammer works in a metal bearinginstead of withinthe strap, r c y Thehelve 18 ispivoted at 25 to the support 1 andis operated through apitman26. from the driving'gear as a long lrey connects the the drivewheel by means of a resilient connection as is common in this art. Thisresilient connection, in this instance, comprises two cushions 27 in theform of hollow rubber cylinders surrounding the pitman. The pitmanhaving abutments 28 adjustably secured thereto and cooperating with theupper end of the upper cushion and the lower end of the lower cushion.Between the two cushions is a common abutment 29 having a cen-. tralopening 30 through which the pitman 26 extends, the top and bottom facesof the common abutment being formed with seats 31 for the cushions 27.This common abutment has two trunnions or bearings 32 projected fromopposite sides thereof in alignment with each other and integral withthe abutment. Two plates 33 bolted on the end of the helve providebearings for the trunnions. With this form of connection between thepitman and the helve, the parts are materially reduced. One memberserves as a common abutment of the two cushions and also for a pivotpin. Friction is also reduced.

What I claim as my invention and desire to secure by Letters Patent is:

1. In a helve operated hammer, the combination with a pivotally mountedhelve and a rotary hammer, of a connection between the helve and thehammer embodying a strap having two ends and bearing frame in which thehammer turns about its longitudinal axis having the ends of the strapdetachably secured thereto, said bearing frame embodying 5 two separatemembers through each of which the hammer passes, and means fordetachably securing said members together with the ends of the strapbetween them.

2. In a helve operated hammer, the combination with a pivotally mountedhelve and a rotary hammer, of a connection between the helve and thehammer embodying a strap having two ends and bearing frame on which thehammer turns about its longitudinal axis having the ends of thestrapdetachably secured thereto, said bearing frame embodying twoseparate members through each of which the hammer passes, and means fordetachably securing said members together with the ends of the strapbetween them, the ends of the lower member extending about the ends ofthe upper member.

3. In a helve operated hammer, the combination with a pivotally mountedhelve and a rotary hammer, of a connection between the helve and thehammer embodying a strap having two ends and bearing frame on which thehammer turns about its longitudinal axis having the ends of the strapdetachably secured thereto, said bearing frame embodying two platesthrough each of whichthe hammer passes and between which the ends of thestrap are passed, and bolts securing said plates together and passingthrough the ends t of the strap.

4. In a machine of the character specified, the combination with arotary reciprocating hammer, and a support therefor having a verticalopening wh1ch is enlarged at its upper end to provide a pocket, of agear in said cket, a bearing sleeve in said vertical openmg and havingits upper portion passing through the said gear and provided with anouter flange extending thereover and fast thereto, the hammer rotatingwith the bearing sleeve and free to reciprocate therein, and a drivingelement mounted in the support and in mesh with the said gear to imparta rotary movement thereto and to the hammer simultaneously with itsreciprocation.

5. In a machine of the character specified, the combination with arotary reciprocating hammer and a support therefor having a vertiealopening which is enlarged at its upper end to provide a pocket, of agear in said pocket, rotatable with the hammer and admitting of thelatter having a free sliding movement therethrough, bearing sleeves inthe said vertical opening having portions disposed on opposite sides ofthe said gear which is confined therebetween, and a gear mounted in thesaid support and in mesh with the aforesaid gear to impart a rotarymovement thereto and to the hammer simultaneously with the reciprocationof the latter.

WILLIAM A. ROCKENFIELD.

